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http://dx.doi.org/10.9713/kcer.2021.59.3.417

Anthracite Oxygen Combustion Simulation in 0.1MWth Circulating Fluidized Bed  

Go, Eun Sol (Department of Environment and Energy, Jeonbuk National University)
Kook, Jin Woo (KW Tech)
Seo, Kwang Won (KW Tech)
Seo, Su Been (Department of Mineral Resources Energy Engineering, Jeonbuk national university)
Kim, Hyung Woo (Department of Mineral Resources Energy Engineering, Jeonbuk national university)
Kang, Seo Yeong (Department of Environment and Energy, Jeonbuk National University)
Lee, See Hoon (Department of Environment and Energy, Jeonbuk National University)
Publication Information
Korean Chemical Engineering Research / v.59, no.3, 2021 , pp. 417-428 More about this Journal
Abstract
The combustion characteristics of anthracite, which follow a complex process with low reactivity, must be considered through the dynamic behavior of circulating fluidized bed (CFB) boilers. In this study, computational fluid dynamics (CFD) simulation was performed to analyze the combustion characteristics of anthracite in a pilot scale 0.1 MWth Oxy-fuel circulating fluidized bed (Oxy-CFB) boiler. The 0.1MWth Oxy-CFB boiler is composed of combustor (0.15 m l.D., 10 m High), cyclone, return leg, and so on. To perform CFD analysis, a 3D simulation model reactor was designed and used. The anthracite used in the experiment has an average particle size of 1,070 ㎛ and a density of 2,326 kg/m3. The flow pattern of gas-solids inside the reactor according to the change of combustion environment from air combustion to oxygen combustion was investigated. At this time, it was found that the temperature distribution in air combustion and oxygen combustion showed a similar pattern, but the pressure distribution was lower in oxygen combustion. addition, since it has a higher CO2 concentration in oxygen combustion than in air combustion, it can be expected that carbon dioxide capture will take place actively. As a result, it was confirmed that this study can contribute to the optimized design and operation of a circulating fluidized bed reactor using anthracite.
Keywords
Anthracite; Circulating fluidized bed; Air combustion; Oxy combustion; Simulation;
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